为了优化可控枪弹结构,对可控枪弹整体结构进行简化处理,用三维软件SolidWorks布尔运算建立数值仿真模型,ICEMCFD生成非结构网格,通过Fluent对可控枪弹外流场数值仿真,得出不同马赫数不同攻角下阻力系数、升力系数、俯仰力矩系数以及压力中心系数变化规律。结果表明,可控枪弹气动特性处于静态稳定临界点,与试验结果相符,需要通过改变弹丸质心或者外形结构以优化结构。

To optimize bullet design, Solidworks was used to simplify overall structure of bullet and establish numerical simulation with Boolean operation, ICEM CFD generated mesh of this model, and simulation was performed by Fluent for outer flow field to obtain drag coefficient, life coefficient, pitching moment coefficient and center of pressure coefficient at different angles and different Mach number. The result shows that the aerodynamic characteristics of a controlled bullet are in critical point for statically stable, which is consistent with the test results, so it is need to optimize the structure by changing the shape or structure of the projectile centroid.